Elastic-fluid turbine.



PATBNTED MAR.- 26, 1907. G. W. BAKE. ELASTIG FLUID TURBINE.- APPLIATIONFILED MAR.22, 1906.

JNVENTOR. Quark@ bflyukv.

@h mmwEn-WEE WTNESSES Nrrnn sT'ATns-PArEN-T OFFICE;

CHARLES W. DAKE, oF GRAND nAPrps,Micl-GAN.

ELAsTlC-FLUID TUBBINE.

.To all whom it mrtg/concern.-

Be-lt known that I, CHARLES W. DAKE, a citizen of the United States,residing at Grand Rapids, in the county of Kent, State of Michigam haveinvented certain new and useful Improvements in Elastic-Fluid Turbines,of which the following is aspecication. This invention relates toimprovements in I' elastic-Huid turbine-engines; and it relates moreparticularly to improvements in the conformation of buckets. The objectsof the invention are first, to increase the bucket capacity within aspecified area, and, second, to provide an improved construction andarrangement of buckets for elastic-fluid turbines in which the energy ofthe jets is utilized to the fullestY degree in actuating the turbinewith the minimum loss on account of friction of Huid in the passages andparts.

Further objects and objects'relating to the details of construction willdefinitely appear from the detailed description to followf I accomplishthe objects ofmy invention bythe devices andv means described in thefollowing specification. 1

The. invention is clearly defined, and4 i pointed out` in the claims.

' Portions of an elastic-Huid turbineillustrating. the features of myinvention are' clearlyl illustrated in the accompanying drawing7 forminga part of this specification, inwhichj Figure 1 is a detailed sectionalview -through 'a nozzle and rowof buckets em-- bodying the features ofmy invention, taken on a line corresponding'to line S S of Fig. 2.

Fig. 2 is'a plan view looking at the faces of said series of buckets,the nozzle bein omitted. y 3 is a detail sectional viewo one of thecomposite buckets, taken on line a:

= of Fig. 1 and Fig. 4 is a.detailed view of a'single bucket asembr'aced between the lines Z' and Z of Fig. 1 looking .directly into'the mouth ofthe bucket, as indicated by the little arrow on the saidFig. 1.t

In thev4 drawings similar numerals o f reference refer to similar partsthroughout the several views.

vA ortion'of the Iturbine-diskl 14 is illuls- Hated) with the U-shapedrecurved buckets 4 2, machinedinto the side'thereofb y suitable,milling-tools. So far as this invention is concerned, however, it is'immaterial how these buckets are formed. QA, secondary 4Tbucketisforjmed bythe dividing-wall 4 Specification of Letters Patent. aApplication filed March 22, 1906. lSerial No. 307,456.

tom ofthe bucket 2.

not pertain tothe nozzle construction.

Patented March 2e, 1907.

which is arranged within the bucket 2,'corresponding in contour to thebottom thereof, and it is separated from the curved bottom wall 5-of thesaid bucket 2 in about the proportion illustrated in Fig. 1.

A portion of wall 4 is cut away, as at 4i', to

permit the passage of steam or other eX` ansive fluid past the said wall,4 into the otvA passage 7 is thus formed at the intakeside of thebucket 2, Where the fluid passes behind the curved wall 4 of saidbucket8'. The intake-passage is somewhat contracted; but thel side of thebucket is formed at an angle, as indicated by' the dotted line '6, (seeFigs. l and 4,) so that the iiuid can expand to the full Width of thebucket by the time it reaches the bottom thereof,and thus secure thebest effect of the impact. It will thus-be seenthat `the buckets 2 and 3really constitute a composite sinfor increasing the efficiency of thejet of glebucket` provided with two bottom walls i steam or elastic Huidand increasing the surl faces on which it reacts indrivingtheturbine-disk within the space usually occupied by a singlebucket. ets are separated from each other by thedividing-walls 8, theWalls 8 having circular notches. at their center which accommodate theshaft or shankof the milling-tool used in for'ming the same, lthat beingso far as I am able to discover, the best method of form- Thesecomposite bucking the main parts of these buckets, although they mightbe formed otherwise so long as the contours I have described arelpreserved. I have shown a nozzle-bowl 1 1 and nozzle I0' in aconventional way, as my invention does I have shown my composite bucketsas provided with two curved walls; but it is perfectly clear that thatnumber could be increased to suit different circumstances.-

In the drawings the long curved arrows show the direction of the iiuidthrough the buckets. The same is delivered at a point corresponding tothe upper side of Fig. 3 in the direction of the long straight arrowapearing there, and as the jet of Huid passes into thev buckets itisdivided, one part reacting againstthe wall 5 of the main bucket 2 IOO'and anotherpart reactin against the wall of the inner bucket 3.' j hesteam or elastic Huid-is thus provided with an abundance ofsurface vforreaction, and its fullforce is `util,-

ized in close proximity tothe mouth of the v nozzle. ,The machinedischarges outwardly, y

as indicated in the said Fig. 3. The bucket,

it Will be observed, can be forrnedeither on the periphery or on theSide of a turbine-disk,

and the advantages of my invention can be substantially secured. Iprefer the face of the Wheel. i Y 1 Having thus described my invention,what I claim as new, andl desire to secure by Letters Patent, is-` l.In'anelastic-luid turbine, the combination f a turbine disk or Wheel l,With a series of composite buckets arranged therein, each bucketconsisting of a main bucket 2, With a curved Wall 5, and an auxiliarybucket 3 Within the same, formed by the curved Wall or partition 4, thesaid wall 4 be- A ing cut away at 4 to form a assage for iiuid againstthe Wall 5 of the mainbucket 2, the passage expandin at 6 and a nozzlearranged to deliver e astic fluid under pressure to impactand react lon,both of said Walls 4 and 5, as specified.

2. In an elastic-fluid turbine, the combination of a turbine disk orWheel W'itha series of 3. In an elastic-fluid turbine, the cornbinationof a turbine disk or Wheel; a bucket with a recurved Wall, arrangedtherein, with an annular auxiliary bucket varranged Within the said mainbucket and having its inlet Within the Walls of the 'main bucket, with'passages formed to deliver into both the main and auxiliary bucketstroni substantially the same point anda nozzle arranged to deliverelastic fluid under pressure to sei,

cure its impact and reaction on the curved Walls of said buckets, asspecified.

4. In an elastic-fluid turbine, a bucket of the recurved type, with aplurality of similar Walls, with inlet-passages thereto connectingwithin the Wall of the main bucket and a nozz'le arrangedto deliverelastic fluid to impact and react on the said Walls, as speciiied.

5. In an elastic-'fluid turbine, a bucket of the recurved type, with aplurality of similar walls, with inlet# assages thereto connectingWithin the Wall o the main bucket,'the same being arranged4 to receive ajet of elastic fluid, coacting as specified.

6. In anfelastic-iluid turbine, the combination of a turbine-disk withmain buckets of` the recurved type with an annular auxiliary bucketWithin each of the said main buckets,

the said auxiliary buckets having their in- .lets Within the Walls ofthe said main buckets with a. passage or passages to deliver the iiuidto both the main and theauxiliary buckets from substantially the samepoint, to

secure its .impact and reaction on the curved i Walls thereof, asspecified. I

In Witness whereof I have hereunto set my hand and seal in the presenceof two Witnesses.

CHARLES W. [1.. s] Witnesses:

- FRED L. CHAPPELL,

CLARA. A. SABIN.

